| The cycles themselves are controlled mainly by a region within the brain's hypothalamus known as the suprachiasmatic nucleus. |
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| Within mammals a region of the hypothalamus known as the suprachiasmatic nucleus acts as a central clock regulating rhythms throughout the rest of the body. |
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| Bright light regulates the suprachiasmatic nucleus clock, known by most as our body's internal clock. |
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| A clump of nerve cells, known as the suprachiasmatic nucleus, regulates the brain's internal clock by measuring the amount of light the eyes register. |
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| This region, called the suprachiasmatic nucleus or SCN, is just above the optic nerve on both sides of the brain. |
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| The circadian clock, which tracks the cycle of day and night, lurks in the suprachiasmatic nucleus, in the hypothalamus. |
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| Light exposure signals an area of the brain called the suprachiasmatic nucleus, a cluster of cells near the spot where the optic nerves cross. |
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| Photoreceptors at the backs of your eyes pick up light and send corresponding electrical signals to the suprachiasmatic nucleus, in your brain. |
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| It is generally agreed that the suprachiasmatic nucleus of the hypothalamus is the physical site of the clock that drive the circadian rhythms. |
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| Neurons in the suprachiasmatic nucleus communicate those rhythms to the rest of the brain and the body by pumping out the hormone vasopressin in daily cycles. |
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